* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

ul, li {
  list-style: none;
}

#root {
  height: 100%;
}

.wrapper {
  height: 100%;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1
}

ul {
  height: 44px;
  display: flex;
  border-top: solid 1px #ccc;
}

li {
  flex: 1;
  line-height: 44px;
  text-align: center;
}

li.active {
  background-color: aliceblue;
}



.my-node-enter {
  opacity: 0;
}
.my-node-enter-active {
  opacity: 1;
  transition: opacity 300ms;
}
.my-node-enter-done {
  opacity: 1;
}
.my-node-exit {
  opacity: 1;
}
.my-node-exit-active {
  opacity: 0;
  transition: opacity 300ms;
}
.my-node-exit-done {
  opacity: 0;
}